import java.io.*;
import java.util.*;
public class Example10_16 {
	public static void main(String args[]) {
		File file = new File("student.txt");
		Scanner sc=null;
		int count=0;
		double sum=0;
		try {
		       	double score=0;
			sc = new Scanner(file);
			sc.useDelimiter("[^0123456789.]+"); 
			while(sc.hasNextDouble()){
				score=sc.nextDouble();
				count++;
				sum=sum+score;
				System.out.println(score); 
			}
			double aver=sum/count;
			System.out.println("ƽɼ:"+aver);
		}
		catch(Exception exp){
			System.out.println(exp); 
		}
	}
}
